Where: Yamanashi · Asia · approx. 35.75, 138.6 (vicinity only)
Why this spot: Hydrothermal quartz veins in granite
What turns up: Japan-law twin quartz, rock crystal, from the historic Kai/Kofu district
Access: Prohibited / view only.
Classic quartz mines are closed/protected; Japanese collecting culture is strict and most sites are off-limits, buy historic specimens
Open in Mudlark Map →
Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.
Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.